Files
clang-p2996/clang
Akira Hatanaka 3738ce05a7 Add support for a backdoor driver option that enables emitting header
usage information in JSON to a file

Each line in the file is a JSON object that has the name of the main
source file followed by the list of system header files included
directly or indirectly from that file.

For example:

{"source":"/tmp/foo.c",
 "includes":["/usr/include/stdio.h", "/usr/include/stdlib.h"]}

To reduce the amount of data written to the file, only the system
headers that are directly included from a non-system header file are
recorded.

In order to emit the header information in JSON, it is necessary to set
the following environment variables:

CC_PRINT_HEADERS_FORMAT=json CC_PRINT_HEADERS_FILTERING=only-direct-system

The following combination is equivalent to setting CC_PRINT_HEADERS=1:

CC_PRINT_HEADERS_FORMAT=textual CC_PRINT_HEADERS_FILTERING=none

Differential Revision: https://reviews.llvm.org/D137996
2022-12-07 15:30:19 -08:00
..
2022-12-06 12:42:35 +03:00

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source-level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:             http://clang.llvm.org/
Building and using Clang:         http://clang.llvm.org/get_started.html
Clang Static Analyzer:            http://clang-analyzer.llvm.org/
Information on the LLVM project:  http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang forums:
  https://discourse.llvm.org/c/clang/

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/